I am in Asia and I have a Diseqc (should be Compatible with 2.0 version) which connect with 4 Satellite, LNB1=105.5 LNB2=115.5 LNB3=138.0 LNB4=146.0. And the DVB-S card is Twinhan 1020A.

Everything hardware is working well under Windows system, and now I want move it to Linux.VDR has been successfully setup which I can use it watching LNB1 channel without any problem. ( I use dvbscan to scan generate the channel.conf)

But, when I want add LNB2 or LNB3 and 4's channel, it looks dvbscan can not switch to them and tuning. I have spend lots of time Google the answer but can not find any useful solutions.

The problem simple description is that the command:

>dvbscan /usr/share/dvb/dvb-s/AsiaSat3S_C-105.5E -l 5750 -s 0

using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder 4000000 H 26850000 3 >>> tune to: 4000:h:0:26850 DVB-S IF freq is 1750000

>dvbscan /usr/share/dvb/dvb-s/AsiaSat3S_C-105.5E -l 5750 -s 1

scanning /usr/share/dvb/dvb-s/AsiaSat3S_C-105.5Escanning /usr/share/dvb/dvb-s/AsiaSat3S_C-105.5E using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder 4000000 H 26850000 3 >>> tune to: 4000:h:1:26850 DVB-S IF freq is 1750000

it looks response the same result(channel list) even if I use different "-s N" parameter.

But the command: >dvbscan /usr/share/dvb/dvb-s/Asia6B_C-115.5E -l 5750 -s 1

scanning /usr/share/dvb/dvb-s/Asia6B_C-115.5E using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder 3840000 H 27500000 3 >>> tune to: 3840:h:1:27500 DVB-S IF freq is 1910000 WARNING: >>> tuning failed!!!

If, I un-plug the line from LNB2 and plug into the LNB1 on my Diseqc, above command will successful find channel too.

I try to modify the diseqc.conf file, but it looks only worked for vdr not for dvbscan...

So, what can I do and any suggestions?

Regards,

Rocky.Lee